Gastriode
充气三极管, 闸流管
🗣️ 情景例句
He has a large family to feed.
他要养活一个大家庭。
My brother is two years younger than I am.
我的兄弟比我年轻2年。
I didn't know he was the richest person in the world.
我不知道他是世界上最有钱的人。